ADVANCED MATERIALS
·
2026
·
IF 29.1
Jiaxing Xiong,Tianshu Ma,Luolei Shi,Jing Zhang,Yuhong Xu,Qiuxiang Wang,Wendong Zhu,Rong Xuan,Zhenhai Yang,Changlei Wang,Xiaofeng Li,Like Huang,Xiaohui Liu,Yuejin Zhu,Dewei Zhao
All-perovskite tandem solar cells (TSCs) offer a path to exceed the Shockley–Queisser limit of single-junction devices, yet their development is hindered by the inferior efficiency and stability of low-bandgap tin-lead (Sn-Pb) perovskite bottom cells. The inherent grain boundaries (GBs) in Sn-Pb perovskites feature detrimental p -type energy states and unfavorable upward energy band bending that promote non-radiative charge recombination and pathways for ion migration-induced degradation. Herein, we employ dipole management at GBs of Sn-Pb perovskite by 4-(trifluoromethyl)benzohydrazide (FBH), which effectively modulates the GB energy landscape throughout the film. The dipole effect reverses the top surface GB energy states to create downward bending of the energy band, promoting efficient charge separation at GBs. Concurrently, FBH treatment enhances perovskite film quality through grain growth regulation, defect passivation, and immobilization of FA + /I − ions. Consequently, the optimized Sn-Pb perovskite solar cell achieves a high efficiency of 23.25% with outstanding operation stability, i.e., keeping over 80% of its initial efficiency under 85°C thermal stress after 400 h and 90% of its original efficiency upon 1872 h in glove box. All-perovskite TSC obtains 29.67% efficiency and retains 90% of its initial efficiency after approximately 1000 h maximum power point tracking.
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高影响因子
Carbon Energy
·
2026
·
IF 21.4
Pubao Peng,Yang Geng,Jiajun Nan,Song Li,Dewei Zhang,Qing Lin,Yaru Gong,Guodong Tang
Polycrystalline SnSe has attracted significant attention due to its facile processing, machinability, and scale-up application. However, n-type polycrystalline SnSe consistently exhibits inferior thermoelectric performance compared to p-type polycrystalline, because SnSe is an intrinsic p-type semiconductor. Here, we promoted the thermoelectric performance of n-type polycrystalline SnSe through manipulating the band structure and dislocations. The band convergence and enhanced density of states in the electronic structure of SnSe promoted by Pb/Ge/Br codoping, lead to significant enhanced Seebeck coefficient. The carrier concentration was simultaneously enhanced through Ge/Pb/Br codoping. The combination of a large Seebeck coefficient and the enhanced electrical conductivity gives rise to a high power factor as high as 7.47 μW cm −1 K −2 at 873 K. Furthermore, we found that dopants induce strong atomic strain disturbance in the SnSe matrix because of large differences in atom radius with host elements, leading to the formation of high-density dislocations. The presence of dislocations and nanoprecipitates forms strong phonon scattering centers, effectively scattering phonons and suppressing lattice thermal conductivity. As a result, a high peak ZT of 1.6 has been obtained in n-type Sn 1.04 Ge 0.02 Pb 0.02 Se 0.97 Br 0.03 .
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CRYSTAL RESEARCH AND TECHNOLOGY
·
2026
·Vol. 61
·期 9
·e70162
·
IF 2.1
Rongtao Ji,Xiaofang Lai,Yongzhao Feng,Duan Zhao,Jikang Jian
Two-dimensional layered metal dichalcogenide SnS 2 has garnered significant attention due to its outstanding electronic and optoelectronic properties, while large-sized SnS 2 single crystals are essential for the successful preparation of such high-performance SnS 2 -based devices. Currently, chemical vapor transport (CVT) is the mainstream technique for growing SnS 2 single crystals, but it heavily relies on transport agents. Moreover, the residual of these agents may introduce additional point defects, which could degrade crystal purity and the optoelectronic properties of the resulting material. In this work, a simple solid-state method was adopted to grow high-quality SnS 2 single crystals without transport agents. X-ray diffraction (XRD) confirms that the crystal grows along the ( 0 0 1 001 $\hskip.001pt 001$ ) plane. The Raman spectrum of the SnS 2 single crystal exhibits a characteristic peak at 313 c m − 1 c m − 1 ${\mathrm{c}}{{\mathrm{m}}^{ - 1}}$ , indicating that the crystal has a 2H-SnS 2 configuration. The band gap of 2.12 e V eV ${\mathrm{eV}}$ was determined, and a single photoluminescence (PL) emission peak centred at 567 n m nm ${\mathrm{nm}}$ , with an average PL lifetime of 3.73 n s ns ${\mathrm{ns}}$ was observed. Photoelectric measurements verify that the SnS 2 single crystal possesses fast and stable response curves, with a response time (
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Journal of Energetic Materials
·
2026
·
IF 1.8
Mingzhu Guo,Zhongyuan Zhang,Zhijiang Jin,Chunlong Huangfu,Xinyu Yang,Hongyan Qu,Zhiyi Li,Feng Luo,Qian Gao
Aluminum powder, a common metallic fuel for propellants and explosives, is limited by high ignition temperatures, incomplete combustion and particle agglomeration. To mitigate these drawbacks, we synthesize core–shell Al–In–Sn ternary alloy fuel by facile melt casting. Eutectic phase separation drives spontaneous formation of an InSn₄ protective shell on Al particle surfaces. The InSn₄ shell functions as a passivation barrier at low temperatures to inhibit premature oxidation and guarantee storage stability. Upon heating above 250 °C, thermal expansion mismatch ruptures the molten shell, exposing active Al and triggering strong exothermic oxidation. The optimized 80Al–In–Sn sample exhibits an oxidation heat release of 1220 J/g (11.5-fold higher than pristine Al), a mass gain efficiency of 76.3%, and reduced activation energy (242.9 kJ/mol by Kissinger method versus 403 kJ/mol for pure Al), verifying greatly enhanced reactivity. Combined DSC and XRD results reveal the temperature-controlled oxidation mechanism. This work offers guidelines for designing storable, highly reactive alloy fuels and facilitates their engineering applications within energetic materials.
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Small
·
2026
·
IF 11.8
Wenyu Yan,Xinyang Xu,Mutian Rao,Bing Yuan,Sufang Li,Yingpeng Wu,Lu Huang
Traditional electromagnetic wave (EMW) absorbing materials are limited by their fixed electromagnetic parameters and structural characteristics, making it difficult to meet the demands of dynamic adjustment in complex electromagnetic environments. The dynamic tunability of wave-absorbing materials can be efficiently achieved by applying external forces to adjust the structure. However, repeated external forces can easily lead to structural damage and performance deterioration. To address these challenges, a flexible, broadband wave-absorbing material with adjustable absorption and self-healing capabilities is fabricated by combining a liquid metal (LM) based wave absorber with a self-healing polymer. Benefiting from LM's high conductivity and deformability and the polymer's self-healing capacity, the wave-absorbing material with high extensibility (∼3000% strain) not only exhibits an excellent effective absorption bandwidth (EAB) of 7.50 GHz in the X and Ku bands, but also can dynamically adjust its wave-absorbing performance under external force. Moreover, the structure and microwave absorption performances of this material can be self-healing at room temperature after damage, recovering ∼98% of its original EAB. Overall, this work provides crucial insights for the development of flexible electromagnetic materials.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qixian Zheng,Tingting Zhang,Suiting Ning,Xiangbin Chen,Tian Yu,Zhangheng Lai,Gangjian Tan,Xinfeng Tang,Ning Qi,Zhiquan Chen
As a typical argyrodite compound, Ag8SnSe6 is a very promising candidate for thermoelectric materials due to its inherently ultralow lattice thermal conductivity. However, the main obstacle to further improving its thermoelectric properties is its low intrinsic carrier concentration. Appropriate doping may increase the carrier concentration, but the electronic thermal conductivity will also increase simultaneously, which partially compensates for the optimized power factor. This is particularly prominent for materials with ultralow lattice thermal conductivity. In this study, SnI2 was introduced into Ag8SnSe6, which provides more carriers and thus successfully improves the electrical properties. The maximum power factor at 748 K is enhanced from 4.63 μW cm–1 K–2 to 5.83 μW cm–1 K–2 after adding 3 at. % of SnI2. Meanwhile, the substitution of I for Se weakens the chemical bonding strength, resulting in a lowered sound velocity. In addition, doping of I at the Se site also enhances the bond asymmetry, which causes a stronger lattice anharmonicity. As a result, an extremely low lattice thermal conductivity of 0.058 W m–1 K–1 is achieved at 748 K. Eventually, a high zT value of 1.36 was obtained through the above synergistic optimization, which is a 39% improvement compared to the pristine sample (0.98). Our study demonstrates that chemical bonding engineering is an effective way to further suppress the lattice thermal conductivity of Ag8SnSe6 and also provides guidance for improving the thermoelectric properties of other argyrodite compounds.
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Advanced Science
·
2025
·
IF 14.1
Kunpeng Zhao,Min Li,Hexige Wuliji,Haotian Gao,Hongyi Chen,Pengfei Qiu,Zhengyang Zhou,Xun Shi
Conventional strategies for suppressing lattice thermal conductivity κ L typically focus on maximizing phonon scattering to reduce phonon mean free path. Such reductions, however, are limited to the interatomic spacing or phonon wavelength. Alternatively, herein, an effective approach is proposed to lower phonon velocity by introducing atoms with significant atomic mismatch into the crystal lattice of three meta-phases. Specifically, substituting Te for S in Ag 8 SnS 6 and Cu 2 S, or Sn for Si in Mg 2 Si considerably increases the atomic mass and weakens the chemical bonding, causing notable reductions in the sound velocity. This reduction further leads to an amorphous-like, extremely low lattice thermal conductivity κ L across the whole temperature range. Consequently, we achieve outstanding thermoelectric performance in these atomic mismatched meta-phases, with a maximum zT of 1.0 for Ag 8 SnS 4.99 Te, 1.1 for Mg 2 Si 0.5 Sn 0.5 , and 2.0 for Cu 2 S 0.5 Te 0.5 . The work demonstrates a new approach to manipulating thermal conductions through lattice softening, providing a promising pathway for designing high-performance thermoelectric materials.
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Advanced Optical Materials
·
2025
·Vol. 13
·期 35
·e01944
·
IF 7.2
Zijuan Ma,Jiaming Song,Xin Zhao,Yelong Wu,Juanjuan Yang,Chengzheng Ye,Jialong Ma,Feng Teng,Peng Hu,Haibo Fan
SnS 2 , a promising candidate for high-performance photodetectors (PDs), encounters challenges as high dark current and poor stability in practical applications. Herein, pristine SnS 2 (P 0 SS) and phosphorus (P) doped SnS 2 single crystals (P 1 SS, P 2 SS) are synthesized and implanted into devices with an asymmetric electrode contact structure, which demonstrate self-powered photoelectric responses. At 0 V, P-doped SnS 2 PDs exhibit significant broadening of the response spectrum. Meanwhile, the P 2 SS device achieves the highest responsivity of 57.4 mA W −1 and specific detectivity of 1.22 × 10 11 Jones at 365 nm, and has superior long-term cyclic stability. At 1 V, the dark current of P 2 SS is significantly lowered, and the on-off ratio is about two orders of magnitude higher than those for the other two at 515 nm. The self-powered phenomenon of the three PDs here is attributed to the asymmetric Schottky barriers at the two gold/SnS 2 interfaces of the source and drain electrodes. The enhanced photoelectric response of the P-doped SnS 2 PDs can be due to the lowered conductivity and higher exciton separation efficiency by the compensation doping. This work offers a promising pathway for optimizing the optoelectronic detection capability of future portable devices.
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APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Mengmeng Li,Busheng Zhang,Junchen Huang,Hongming Chen,Weiguang Wang,Xinbo He
Air annealing and TiC coating engineer diamond surfaces for enhanced interfacial bonding. • Surface-treated Diamond/GaInSn composites achieve thermal conductivity up to 111.6 W m -1 K −1 . • The study reveals a trade-off between bulk conductivity and practical interfacial thermal resistance. • Engineered composites demonstrate superior cooling performance in photovoltaic cell applications. The ever-increasing power density and integration level of modern electronic devices, driven by advances in artificial intelligence and energy technologies, impose stringent demands on thermal management. Conventional cooling strategies often fail to cope with the escalating heat flux, highlighting the urgent need for high-performance thermal interface materials (TIMs). Here, we employ two surface engineering strategies, air annealing and titanium carbide (TiC) coating, to tailor the interfacial properties of micrometer-sized diamond particles. The modified diamonds are then embedded in a gallium-based liquid metal (LM) matrix, yielding composite TIMs with enhanced thermal conductivity and robust interfacial stability. The resulting composites exhibit remarkable thermal conductivities, reaching of up to 111.6 W m −1 K −1 for the air-annealed and 102.4 W m −1 K −1 for the TiC-coated sample. The surface treatments markedly improved the interfacial contact continuity and chemical environment between diamond and liquid metal, thereby mitigating LM leakage and enhancing the overall mechanical integrity of the composites. When integrated into high-power electronic devices, such as photovoltaic cells, these engineered TIMs demonstrate efficient heat dissipation and markedly suppress the operating temperature of the heat source. This work provides a promising material solution for thermal management in high-power electronics and advances the practical application of liquid metal-based composites. In this study, composite thermal interface materials (TIMs) were fabricated using diamond and GaInSn liquid metal as raw materials via a facile surface treatment process, enabling efficient thermal management of electronic devices. Air annealing and titanium carbide (TiC) coating treatments modified the wettability and interfacial bonding strength between reinforced diamond and liquid metal, thereby effectively enhancing the thermal conductivity of the composites. Download: Download high-res image (149KB) Download: Download full-size image
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高影响因子
Metals
·
2023
·Vol. 13
·期 4
·658
·
IF 2.9
Zhen Feng,Ruoxuan Chen,Rui Huang,Fangli Zhang,Weizhen Liu,Sailin Liu
Phosphorus-based materials are considered to be reliable anode materials for potassium ion batteries (PIBs) due to their high theoretical capacity but suffer from inferior cycling stability and an unstable Solid Electrolyte Interface (SEI) layer. Herein, optimized ball-milled parameters and concentrated electrolytes are introduced to enhance the electrochemical performance of Sn4P3/C anodes. Consequently, the electrodes synthesized under optimized ball milling parameters could deliver a reversible capacity of 307.8 mA h g−1in diluted Potassium hexafluorophosphate (KPF6) electrolyte. Moreover, compared with diluted bis(fluorosulfonyl)imide (KFSI) electrolyte, a robust inorganic KF-rich SEI layer can be formed on the electrode’s surface by employing concentrated KFSI electrolyte and provides more rapid K ion conduction rates. Meanwhile, a large proportion of the FSI−anions participated in the K+solvation shell when the KFSI concentration increased. As a result, high specific capacities (225.1 mA h g−1at 50 mA g−1after 200 cycles) and excellent Coulombic efficiency (97.24% at 500 mA g−1after 200 cycles) can be achieved. This work may deepen our understanding of synthetic optimization in electrode material design and the role of concentrated electrolyte in tunning the solvation structure, and also offer an insightful clue to the design of high-capacity phosphorus-based anodes.Keywords:phosphorus-based anode;ball-milling;concentrated electrolyte;solvation structure;SEI layer
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ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chi Ma,Chenyu Qi,Dingbo Wei,Zhenzhen Jiang,Yafei Guo,Nelson Belzile,Tianlong Deng
The efficient and renewable recovery of cesium and strontium by absorption from a new type of geothermal water liquid mineral resource is highly desirable but still challenging. In this work, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was first synthesized and used for Cs+ and Sr2+ green and efficient adsorption. It was found that KZrTS had very fast adsorption kinetics toward both Cs+ and Sr2+ with an equilibrium reached within 1 min, and the theoretical maximum adsorption capacities for Cs+ and Sr2+ were 402.84 and 84.88 mg/g, respectively. Moreover, to solve the loss problem of the engineering application of the powdered adsorbent KZrTS, KZrTS was uniformly coated with polysulfone by wet spinning technology to form micrometer-level filament-like absorbents (Fiber-KZrTS), whose adsorption equilibrium rates and capacities toward Cs+ and Sr2+ are almost the same as that of powder. Furthermore, Fiber-KZrTS showed excellent reusability, and the adsorption performance remained virtually unchanged after 20 cycles. Therefore, Fiber-KZrTS has potential application for green and efficient cesium and strontium recovery from geothermal water.
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2023
·
IF 6.9
Zhu Kou,Jinhui Wang,Xingrui Tong,Pengyang Lei,Yi Gao,Siyu Zhang,Xinpan Cui,Sixin Wu,Guofa Cai
Electrochromic smart windows provide an important route to reduce building energy consumption by dynamically adjusting the transmission of visible and near-infrared light. However, the requirement for an external electrical supply greatly limits their application in energy-saving buildings. Herein, we develop a novel photovoltaic (PV) cell-powered electrochromic energy storage smart window prototype by the combination of nickel-cobalt bimetal oxide electrochromic window and Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cell, which not only realizes the function integration of self-power and intelligent solar radiation regulation, but also extends its function to energy storage. Specifically, the obtained NiCoO 2 electrochromic films display a large optical modulation (60.0% at 550 nm), fast switching time (7.6/11.4 s), outstanding stability and excellent rate capability. Based on the achieved NiCoO 2 film and TiO 2 film, high-performance electrochromic energy storage smart windows (EESW) were further assembled and demonstrated excellent compatibility with CZTSSe solar cell. Benefiting from the unique merits of CZTSSe cell, the self-powered EESW exhibits excellent optical modulation (56.0% at 550 nm) and fast coloration speed (17 s). Moreover, the self-powered EESW can serve as a power source to drive external electronics. Our exploration of multi-functional smart windows offers an effective strategy to realize a highly efficient low-energy building in the future.
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危险品化学品经营许可证（带存储）